Statistics for Business and
Economics II
Stat II 20311
Dr. Shuguang Liu
Outline
Course overview
Administrative stuff
Introduction to stat II
Dr. Liu, School of Business, SUNY New Paltz
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Course Overview
Who Am I?
Ph.D. in management science
Master of Business Administration
Courses taught


OM, MS, BRM, BDSS, Stat
Calculus for Manager
Dr. Liu, School of Business, SUNY New Paltz
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My Contact Information
Office: VH 335
Telephone: x2960
Email: liush@newpaltz.edu
Dr. Liu, School of Business, SUNY New Paltz
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The Goals for This Course Are
Introduce a wide variety of Statistics issues
and techniques
Prepare a foundation for


More in-depth study
Working as a statistician
Maintain a practical focus


Application oriented
Results providing insights to decisions and solution
to problems
Practice using select tools & techniques
Dr. Liu, School of Business, SUNY New Paltz
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Your Learning in This Course
Will Occur in Two Ways
Class discussions
Working problems (quizzes and
assigned homework)
Dr. Liu, School of Business, SUNY New Paltz
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Administrative Stuff
Course Pre-requisites
Statistics – descriptive statistics,
probability
PC software – MS Excel
Dr. Liu, School of Business, SUNY New Paltz
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The Requirements for This
Course Are Simple
Read before you come to class
Participate during class
Take quizzes
Complete homework assignments on
time
Take the exams
Dr. Liu, School of Business, SUNY New Paltz
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The Grading for the Course
Will Be
Quizzes: 15%
Homework (6): 15%
Midterm I: 20%
Midterm II: 20%
Final exam: 30%
Dr. Liu, School of Business, SUNY New Paltz
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Exams Schedule Will Be
Currently scheduled for:



Exam I
Exam II
Final exam
Not cumulative
I’ll allow some notes
Dr. Liu, School of Business, SUNY New Paltz
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Course Materials You’ll Want
to Have
Textbook:

Berenson, Levine, and Krehbiel, basic
business statistics. Prentice hall, 10th
edition.
Dr. Liu, School of Business, SUNY New Paltz
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Course Web Page
http://www.newpaltz.edu/~liush/stat2.htm
Handouts as they become available
Homework solutions
Announcements
So check frequently
Dr. Liu, School of Business, SUNY New Paltz
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Some Introduction
Why Are You Taking This
Course?
I have a burning desire to be an
statistician
I’m strangely attracted to statistics and
related subjects
They made me do it
Dr. Liu, School of Business, SUNY New Paltz
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Descriptive Statistics
Descriptive statistics are the tabular,
graphical, and numerical methods used
to summarize data.
Dr. Liu, School of Business, SUNY New Paltz
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Numerical Descriptive
Statistics
 The most common numerical descriptive statistic
is the average (or mean).
 Hudson’s average cost of parts, based on the 50
tune-ups studied, is $79 (found by summing the
50 cost values and then dividing by 50).
Dr. Liu, School of Business, SUNY New Paltz
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Statistical Inference
Population
- the set of all elements of interest in a
particular study
Sample - a subset of the population
Statistical inference - the process of using data obtained
from a sample to make estimates
and test hypotheses about the
characteristics of a population
Census - collecting data for a population
Sample survey - collecting data for a sample
Dr. Liu, School of Business, SUNY New Paltz
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Process of Statistical Inference
1. Population
consists of all
tune-ups. Average
cost of parts is
unknown.
2. A sample of 50
4. The sample average
3. The sample data
is used to estimate the
population average.
engine tune-ups
is examined.
provide a sample
average parts cost
of $79 per tune-up.
Dr. Liu, School of Business, SUNY New Paltz
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Computers and Statistical
Analysis
 Statistical analysis often involves working with
large amounts of data.
 Computer software is typically used to conduct the
analysis.
 Statistical software packages such as Microsoft Excel
and Minitab are capable of data management, analysis,
and presentation.
 Instructions for using Excel and Minitab are provided
in chapter appendices.
Dr. Liu, School of Business, SUNY New Paltz
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What Will be Covered?
Hypothesis Testing


One population
Two population
Analysis of Variance and Experimental
Design
Simple Linear Regression
Dr. Liu, School of Business, SUNY New Paltz
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Projected Schedule
Dr. Liu, School of Business, SUNY New Paltz
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